Microscopes. Eukaryotes Eukaryotic cells are characterized by having: DNA in a nucleus that is bounded by a membranous nuclear envelope
|
|
- Charlene Wheeler
- 7 years ago
- Views:
Transcription
1 CH 6 The Cell Microscopy Scientists use microscopes to visualize cells too small to see with the naked eye. In a light microscope (LM), visible light is passed through a specimen and then through glass lenses. Lenses refract (bend) the light, so that the image is magnified. Microscopes LMs can magnify effectively to about 1,000 times the size of the actual specimen. Various techniques enhance contrast and enable cell components to be stained or labeled. Most subcellular structures, including organelles (membrane-enclosed compartments), are too small to be resolved by an LM. Two basic types of electron microscopes (EMs) are used to study subcellular structures. Scanning electron microscopes (SEMs) focus a beam of electrons onto the surface of a specimen, providing images that look 3-D. Transmission electron microscopes (TEMs) focus a beam of electrons through a specimen. TEMs are used mainly to study the internal structure of cells. Eukaryotic cell compartmentalization of functions The basic structural and functional unit of every organism is one of two types of cells: prokaryotic or eukaryotic. Only organisms of the domains Bacteria and Archaea consist of prokaryotic cells. Protists, fungi, animals, and plants all consist of eukaryotic cells. Prokaryotic vs. Eukaryotic Basic features of all cells Plasma membrane Semifluid substance called cytosol Chromosomes (carry genes) Ribosomes (make proteins) Prokaryotes Prokaryotic cells are characterized by having No nucleus DNA in an unbound region called the nucleoid No membrane-bound organelles Cytoplasm bound by the plasma membrane Eukaryotes Eukaryotic cells are characterized by having: DNA in a nucleus that is bounded by a membranous nuclear envelope
2 Membrane-bound organelles Cytoplasm in the region between the plasma membrane and nucleus Eukaryotic cells are generally much larger than prokaryotic cells. The plasma membrane is a selective barrier that allows sufficient passage of oxygen, nutrients, and waste to service the volume of every cell. The general structure of a biological membrane is a double layer of phospholipids. Metabolic requirements set upper limits on the size of cells. The surface area to volume ratio of a cell is critical. As the surface area increases by a factor of n2, the volume increases by a factor of n3. Small cells have a greater surface area relative to volume. Tour of an animal cell Tour of a plant cell Eukaryotic nucleus & ribosomes The nucleus contains most of the DNA in a eukaryotic cell. Ribosomes use the information from the DNA to make proteins. Nucleus The nucleus contains most of the cell s genes and is usually the most conspicuous organelle. The nuclear envelope encloses the nucleus, separating it from the cytoplasm. The nuclear membrane is a double membrane; each membrane consists of a lipid bilayer. In the nucleus, DNA is organized into discrete units called chromosomes. Each chromosome is composed of a single DNA molecule associated with proteins. The DNA and proteins of chromosomes are together called chromatin. Chromatin condenses to form discrete chromosomes as a cell prepares to divide. The nucleolus is located within the nucleus and is the site of ribosomal RNA (rrna) synthesis. Ribosomes Ribosomes are particles made of ribosomal RNA and protein. Ribosomes carry out protein synthesis in two locations: In the cytosol (free ribosomes) On the outside of the endoplasmic reticulum or the nuclear envelope (bound ribosomes)
3 Endomembrane System Components of the endomembrane system: Nuclear envelope Endoplasmic reticulum Golgi apparatus Lysosomes Vacuoles Plasma membrane These components are either continuous or connected via transfer by vesicles. ER: the factory The endoplasmic reticulum (ER) accounts for more than half of the total membrane in many eukaryotic cells. The ER membrane is continuous with the nuclear envelope. There are two distinct regions of ER: Smooth ER, which lacks ribosomes Rough ER, surface is studded with ribosomes Smooth ER The smooth ER: Synthesizes lipids Metabolizes carbohydrates Detoxifies drugs and poisons Stores calcium ions Rough ER The rough ER: Has bound ribosomes, which secrete glycoproteins (proteins covalently bonded to carbohydrates). Distributes transport vesicles, proteins surrounded by membranes. Is a membrane factory for the cell. Golgi Apparatus: The Golgi apparatus consists of flattened membranous sacs called cisternae. Functions of the Golgi apparatus: Modifies products of the ER Manufactures certain macromolecules Sorts and packages materials into transport vesicles Lysosomes A lysosome is a membranous sac of hydrolytic enzymes that can digest macromolecules. Lysosomal enzymes can hydrolyze proteins, fats, polysaccharides, and nucleic acids. Lysosomal enzymes work best in the acidic environment inside the lysosome. Some types of cell can engulf another cell by phagocytosis; this forms a food vacuole A lysosome fuses with the food vacuole and digests the molecules
4 Lysosomes also use enzymes to recycle the cell s own organelles and macromolecules, a process called autophagy Vacuoles A plant cell or fungal cell may have one or several vacuoles, derived from endoplasmic reticulum and Golgi apparatus. Food vacuoles are formed by phagocytosis. Contractile vacuoles, found in many freshwater protists, pump excess water out of cells. Central vacuoles, found in many mature plant cells, hold organic compounds and water. Review Mitochondria Mitochondria are the sites of cellular respiration, a metabolic process that uses oxygen to generate ATP. Chloroplasts, found in plants and algae, are the sites of photosynthesis. Peroxisomes are oxidative organelles. Origins related to bacteria Mitochondria and chloroplasts have similarities with bacteria: Enveloped by a double membrane Contain free ribosomes and circular DNA molecules Grow and reproduce somewhat independently in cells Endosymbiont Theory An early ancestor of eukaryotic cells engulfed a nonphotosynthetic prokaryotic cell, which formed an endosymbiont relationship with its host. The host cell and endosymbiont merged into a single organism, a eukaryotic cell with a mitochondrion. At least one of these cells may have taken up a photosynthetic prokaryote, becoming the ancestor of cells that contain chloroplasts. Mitochondria Mitochondria are in nearly all eukaryotic cells. They have a smooth outer membrane and an inner membrane folded into cristae. The inner membrane creates two compartments: intermembrane space and mitochondrial matrix. Some metabolic steps of cellular respiration are catalyzed in the mitochondrial matrix. Cristae present a large surface area for enzymes that synthesize ATP. Chloroplasts: Capture of Light Chloroplasts contain the green pigment chlorophyll, as well as enzymes and other molecules that function in photosynthesis.
5 Chloroplasts are found in leaves and other green organs of plants and in algae. Chloroplast structure includes: Thylakoids, membranous sacs, stacked to form a granum Stroma, the internal fluid The chloroplast is one of a group of plant organelles, called plastids. Peroxisomes Peroxisomes are specialized metabolic compartments bounded by a single membrane. Peroxisomes produce hydrogen peroxide and convert it to water. Peroxisomes perform reactions with many different functions. How peroxisomes are related to other organelles is still unknown. Cytoskeleton The cytoskeleton is a network of fibers extending throughout the cytoplasm. It organizes the cell s structures and activities, anchoring many organelles. It is composed of three types of molecular structures: Microtubules Microfilaments Intermediate filaments Support and Motility The cytoskeleton helps to support the cell and maintain its shape. It interacts with motor proteins to produce motility. Inside the cell, vesicles can travel along monorails provided by the cytoskeleton. Recent evidence suggests that the cytoskeleton may help regulate biochemical activities. Components of the Cytoskeleton Three main types of fibers make up the cytoskeleton: Microtubules are the thickest of the three components of the cytoskeleton Microfilaments, also called actin filaments, are the thinnest components Intermediate filaments are fibers with diameters in a middle range Microtubules Microtubules are hollow rods about 25 nm in diameter and about 200 nm to 25 microns long. Functions of microtubules: Shaping the cell Guiding movement of organelles Separating chromosomes during cell division In many cells, microtubules grow out from a centrosome near the nucleus. The centrosome is a microtubule-organizing center. In animal cells, the centrosome has a pair of centrioles, each with nine triplets of microtubules arranged in a ring.
6 Cilia & Flagella Microtubules control the beating of cilia and flagella, locomotor appendages of some cells. Cilia and flagella differ in their beating patterns. Paramecium Cilia Cilia and flagella share a common structure A core of microtubules sheathed by the plasma membrane A basal body that anchors the cilium or flagellum A motor protein called dynein, which drives the bending movements of a cilium or flagellum Microfilaments Microfilaments are solid rods about 7 nm in diameter, built as a twisted double chain of actin subunits. The structural role of microfilaments is to bear tension, resisting pulling forces within the cell. They form a 3-D network called the cortex just inside the plasma membrane to help support the cell s shape. Bundles of microfilaments make up the core of microvilli of intestinal cells. Microfilaments that function in cellular motility contain the protein myosin in addition to actin. In muscle cells, thousands of actin filaments are arranged parallel to one another. Thicker filaments composed of myosin interdigitate with the thinner actin fibers. Intermediate Filaments Intermediate filaments range in diameter from 8 12 nanometers, larger than microfilaments but smaller than microtubules. They support cell shape and fix organelles in place. Intermediate filaments are more permanent cytoskeleton fixtures than the other two classes. Extracellular Structures The cell wall is an extracellular structure that distinguishes plant cells from animal cells. Prokaryotes, fungi, and some protists also have cell walls. The cell wall protects the plant cell, maintains its shape, and prevents excessive uptake of water. Plant cell walls are made of cellulose fibers embedded in other polysaccharides and protein. Functions Support Adhesion Movement Regulation Extracellular Structures
7 Animal cells lack cell walls but are covered by an elaborate extracellular matrix (ECM). The ECM is made up of glycoproteins such as collagen, proteoglycans, and fibronectin. ECM proteins bind to receptor proteins in the plasma membrane called integrins. Extracellular Structures Neighboring cells in tissues, organs, or organ systems often adhere, interact, and communicate through direct physical contact. Intercellular junctions facilitate this contact. There are several types of intercellular junctions Plasmodesmata Tight junctions Desmosomes Gap junctions Plant Cells Plasmodesmata are channels that perforate plant cell walls. Through plasmodesmata, water and small solutes (and sometimes proteins and RNA) can pass from cell to cell. Animal Cells At tight junctions, membranes of neighboring cells are pressed together, preventing leakage of extracellular fluid. Desmosomes (anchoring junctions) fasten cells together into strong sheets. Gap junctions (communicating junctions) provide cytoplasmic channels between adjacent cells.
The Cell: Organelle Diagrams
The Cell: Organelle Diagrams Fig 7-4. A prokaryotic cell. Lacking a true nucleus and the other membrane-enclosed organelles of the eukaryotic cell, the prokaryotic cell is much simpler in structure. Only
More informationCytology. Living organisms are made up of cells. Either PROKARYOTIC or EUKARYOTIC cells.
CYTOLOGY Cytology Living organisms are made up of cells. Either PROKARYOTIC or EUKARYOTIC cells. A. two major cell types B. distinguished by structural organization See table on handout for differences.
More informationChapter 2: Cell Structure and Function pg. 70-107
UNIT 1: Biochemistry Chapter 2: Cell Structure and Function pg. 70-107 Organelles are internal structures that carry out specialized functions, interacting and complementing each other. Animal and plant
More informationBiology 101 Chapter 4 Cells as the Basic Unit of Life. The Cell Theory Major Contributors: Galileo = first observations made with a microscope
Biology 101 Chapter 4 Cells as the Basic Unit of Life The Cell Theory Major Contributors: Galileo = first observations made with a microscope Robert Hooke = first to observe small compartments in dead
More informationChapter 4: A Tour of the Cell. 1. Cell Basics. Limits to Cell Size. 1. Cell Basics. 2. Prokaryotic Cells. 3. Eukaryotic Cells
Chapter 4: A Tour of the Cell 1. Cell Basics 2. Prokaryotic Cells 3. Eukaryotic Cells 1. Cell Basics Limits to Cell Size There are 2 main reasons why cells are so small: If cells get too large: 1) there
More informationBacterial (Prokaryotic) Cell. Common features of all cells. Tour of the Cell. Eukaryotic Cell. Plasma Membrane defines inside from outside
www.denniskunkel.com Tour of the Cell www.denniskunkel.com Today s Topics Properties of all cells Prokaryotes and Eukaryotes Functions of Major Cellular Organelles Information, Synthesis&Transport,, Vesicles
More informationLecture 4 Cell Membranes & Organelles
Lecture 4 Cell Membranes & Organelles Structure of Animal Cells The Phospholipid Structure Phospholipid structure Encases all living cells Its basic structure is represented by the fluidmosaic model Phospholipid
More informationPlasma Membrane hydrophilic polar heads
The Parts of the Cell 3 main parts in ALL cells: plasma membrane, cytoplasm, genetic material this is about the parts of a generic eukaryotic cell Plasma Membrane -is a fluid mosaic model membrane is fluid
More informationcells - relatively simple cells - lack nuclear membrane and many organelles - bacteria and their relatives are all prokaryotic
Cell Biology A cell is chemical system that is able to maintain its structure and reproduce. Cells are the fundamental unit of life. All living things are cells or composed of cells. 1 The interior contents
More informationCell Structure & Function!
Cell Structure & Function! Chapter 3! The most exciting phrase to hear in science, the one that heralds new discoveries, is not 'Eureka!' but 'That's funny.! -- Isaac Asimov Animal Cell Plant Cell Cell
More informationCell Structure and Function. Eukaryotic Cell: Neuron
Cell Structure and Function Eukaryotic Cell: Neuron Cell Structure and Function Eukaryotic Cells: Blood Cells Cell Structure and Function Prokaryotic Cells: Bacteria Cell Structure and Function All living
More informationThe Cell Interior and Function
The Cell Interior and Function 5 5.0 CHAPTER PREVIEW Investigate and understand the organization and function of the cell interior. Define the differences between eukaryotic and prokaryotic cell structure.
More informationReview of the Cell and Its Organelles
Biology Learning Centre Review of the Cell and Its Organelles Tips for most effective learning of this material: Memorize the names and structures over several days. This will help you retain what you
More information7.2 Cell Structure. Lesson Objectives. Lesson Summary. Cell Organization Eukaryotic cells contain a nucleus and many specialized structures.
7.2 Cell Structure Lesson Objectives Describe the structure and function of the cell nucleus. Describe the role of vacuoles, lysosomes, and the cytoskeleton. Identify the role of ribosomes, endoplasmic
More informationCell Structure and Function
Bio 100 - Cells 1 Cell Structure and Function Tenets of Cell Theory 1. All living things are made up of one or more cells 2. Cells are the basic living units within organisms, and the chemical reactions
More informationCELLS: PLANT CELLS 20 FEBRUARY 2013
CELLS: PLANT CELLS 20 FEBRUARY 2013 Lesson Description In this lesson we will discuss the following: The Cell Theory Terminology Parts of Plant Cells: Organelles Difference between plant and animal cells
More informationCompartmentalization of the Cell. Objectives. Recommended Reading. Professor Alfred Cuschieri. Department of Anatomy University of Malta
Compartmentalization of the Cell Professor Alfred Cuschieri Department of Anatomy University of Malta Objectives By the end of this session the student should be able to: 1. Identify the different organelles
More informationCells & Cell Organelles
Cells & Cell Organelles The Building Blocks of Life H Biology Types of cells bacteria cells Prokaryote - no organelles Eukaryotes - organelles animal cells plant cells Cell size comparison Animal cell
More information3.1 AS Unit: Cells, Exchange and Transport
3.1 AS Unit: Cells, Exchange and Transport Module 1: Cells 1.1.1 Cell Structure Candidates should be able to: (a) state the resolution and magnification that can be achieved by a light microscope, a transmission
More informationOrganelles and Their Functions
Organelles and Their Functions The study of cell organelles and their functions is a fascinating part of biology. The current article provides a brief description of the structure of organelles and their
More informationEukaryotes. www.njctl.org PSI Biology Eukaryotes & Gene Expression
Eukaryotes The Eukaryotic Cell Classwork 1. Identify two characteristics that are shared by all cells. 2. Suppose you are investigating a cell that contains a nucleus. Would you categorize this cell as
More informationAP BIOLOGY 2006 SCORING GUIDELINES. Question 1
AP BIOLOGY 2006 SCORING GUIDELINES Question 1 A major distinction between prokaryotes and eukaryotes is the presence of membrane-bound organelles in eukaryotes. (a) Describe the structure and function
More informationRAD 223. Radiography physiology. Lecture Notes. First lecture: Cell and Tissue
RAD 223 Radiography physiology Lecture Notes First lecture: Cell and Tissue Physiology: the word physiology derived from a Greek word for study of nature. It is the study of how the body and its part work
More informationCells. Structure, Function and Homeostasis
Cells Structure, Function and Homeostasis Characteristics of Cells Basic unit of life anything alive is made of cells Plasma membrane (skin) that separates them from the environment. Skeletonsfor protection
More informationChapter 5 Organelles. Lesson Objectives List the organelles of the cell and their functions. Distinguish between plant and animal cells.
Chapter 5 Organelles Lesson Objectives List the organelles of the cell and their functions. Distinguish between plant and animal cells. Check Your Understanding What is a cell? How do we visualize cells?
More informationTHE HISTORY OF CELL BIOLOGY
SECTION 4-1 REVIEW THE HISTORY OF CELL BIOLOGY Define the following terms. 1. cell 2. cell theory Write the correct letter in the blank. 1. One early piece of evidence supporting the cell theory was the
More informationQuick Hit Activity Using UIL Science Contests For Formative and Summative Assessments of Pre-AP and AP Biology Students
Quick Hit Activity Using UIL Science Contests For Formative and Summative Assessments of Pre-AP and AP Biology Students Activity Title: Quick Hit Goal of Activity: To perform formative and summative assessments
More informationBiology I. Chapter 7
Biology I Chapter 7 Interest Grabber NOTEBOOK #1 Are All Cells Alike? All living things are made up of cells. Some organisms are composed of only one cell. Other organisms are made up of many cells. 1.
More informationComparing Plant And Animal Cells
Comparing Plant And Animal Cells http://khanacademy.org/video?v=hmwvj9x4gny Plant Cells shape - most plant cells are squarish or rectangular in shape. amyloplast (starch storage organelle)- an organelle
More informationIntroduction to the Cell: Plant and Animal Cells
Introduction to the Cell: Plant and Animal Cells Tissues, Organs, and Systems of Living Things Cells, Cell Division, and Animal Systems and Plant Systems Cell Specialization Human Systems All organisms
More informationKeystone Review Practice Test Module A Cells and Cell Processes. 1. Which characteristic is shared by all prokaryotes and eukaryotes?
Keystone Review Practice Test Module A Cells and Cell Processes 1. Which characteristic is shared by all prokaryotes and eukaryotes? a. Ability to store hereditary information b. Use of organelles to control
More informationPlant and Animal Cells
Plant and Animal Cells a. Explain that cells take in nutrients in order to grow, divide and to make needed materials. S7L2a b. Relate cell structures (cell membrane, nucleus, cytoplasm, chloroplasts, and
More informationThe Cell Teaching Notes and Answer Keys
The Cell Teaching Notes and Answer Keys Subject area: Science / Biology Topic focus: The Cell: components, types of cells, organelles, levels of organization Learning Aims: describe similarities and differences
More information7.2 Cells: A Look Inside
CHAPTER 7 CELL STRUCTURE AND FUNCTION 7.2 Cells: A Look Inside Imagine a factory that makes thousands of cookies a day. Ingredients come into the factory, get mixed and baked, then the cookies are packaged.
More informationBME 42-620 Engineering Molecular Cell Biology. Lecture 02: Structural and Functional Organization of
BME 42-620 Engineering Molecular Cell Biology Lecture 02: Structural and Functional Organization of Eukaryotic Cells BME42-620 Lecture 02, September 01, 2011 1 Outline A brief review of the previous lecture
More informationChapter 3. Cellular Structure and Function Worksheets. 39 www.ck12.org
Chapter 3 Cellular Structure and Function Worksheets (Opening image copyright by Sebastian Kaulitzki, 2010. Used under license from Shutterstock.com.) Lesson 3.1: Introduction to Cells Lesson 3.2: Cell
More informationBiological cell membranes
Unit 14: Cell biology. 14 2 Biological cell membranes The cell surface membrane surrounds the cell and acts as a barrier between the cell s contents and the environment. The cell membrane has multiple
More informationCELL ANALOGY: AIRPORT. By: Joe Behrmann and Isaac Thompson
CELL ANALOGY: AIRPORT By: Joe Behrmann and Isaac Thompson MITOCHONDRIA Location: The Mitochondria of a cell is located in both plant and animal cells. They are found floating throughout the cell. Function:
More informationchapter3 Cell Structure and Function
chapter3 Cell Structure and Function Chapter Concepts 3.1 the cellular level of Organization What does the cell theory state? 46 What instruments would a scientist use to study and view small cells? 46
More informationCommon Characteristics of cells
Characteristics of Cells Introduction to Cells Biology is the subject of life and living organisms. The living organisms are diverse in almost every aspect. What a great difference exists between human
More informationObjective: On a team of no more than (2). Build to illustrate a 3D model of a PLANT or ANIMAL cell. 10 pts.
THE CELL model: Activity 4.1 Science / Biology Objective: On a team of no more than (2). Build to illustrate a 3D model of a PLANT or ANIMAL cell. - Your models should clearly demonstrate the following
More informationDate: Student Name: Teacher Name: Jared George. Score: 1) A cell with 1% solute concentration is placed in a beaker with a 5% solute concentration.
Biology Keystone (PA Core) Quiz Homeostasis and Transport - (BIO.A.4.1.1 ) Plasma Membrane, (BIO.A.4.1.2 ) Transport Mechanisms, (BIO.A.4.1.3 ) Transport Facilitation Student Name: Teacher Name: Jared
More information1. When applying the process of science, which of these is tested? a. an observation b. a result c. a hypothesis d. a question e.
BCOR 11 Exam 1, 2004 MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1. When applying the process of science, which of these is tested? a. an observation
More information* The cell is the basic structural and functional unit of life. * Organismal activity depends on individual and collective activity of cells.
Define Cell * The cell is the basic structural and functional unit of life. * Organismal activity depends on individual and collective activity of cells. * Biochemical activities of cells are dictated
More informationBiology Chapter 7 Practice Test
Biology Chapter 7 Practice Test Multiple Choice Write the letter that best answers the question or completes the statement on the line provided. 1. The work of Schleiden and Schwann can be summarized by
More informationCell Unit Practice Test #1
ell Unit Practice Test #1 Name: ate: 1. Which organelle is primarily concerned with the conversion of potential energy of organic compounds into suitable form for immediate use by the cell?. mitochondria.
More informationProkaryotic and Eukaryotic Cells
Lab 2- Bio 201 Prokaryotic and Eukaryotic Cells Name: OBJECTIVES To explore cell structure and morphology in prokaryotes and eukaryotes. To gain more experience using the microscope, and in particular,
More informationBSC 2010 - Exam I Lectures and Text Pages. The Plasma Membrane Structure and Function. Phospholipids. I. Intro to Biology (2-29) II.
BSC 2010 - Exam I Lectures and Text Pages I. Intro to Biology (2-29) II. Chemistry of Life Chemistry review (30-46) Water (47-57) Carbon (58-67) Macromolecules (68-91) III. Cells and Membranes Cell structure
More informationThe microscope is an important tool.
KEY CONCEPT Microscopes allow us to see inside the cell. BEFORE, you learned Some organisms are unicellular and some are multicellular A microscope is necessary to study most cells The cell theory describes
More informationAnatomy and Physiology Placement Exam 2 Practice with Answers at End!
Anatomy and Physiology Placement Exam 2 Practice with Answers at End! General Chemical Principles 1. bonds are characterized by the sharing of electrons between the participating atoms. a. hydrogen b.
More informationLesson Aim To explain the human body at a microscopic level, including the structure and function of cells, tissues and membranes.
LESSON 1. CELLS & TISSUES Lesson Aim To explain the human body at a microscopic level, including the structure and function of cells, tissues and membranes. THE CELL All living matter is composed of functional
More informationDo Not Write on this Quiz Paper (südamlik aitäh)
1. This makes ribosomes. Cell Organelle Quiz Do Not Write on this Quiz Paper (südamlik aitäh) a. Rough ER c. Golgi apparatus (body) b. Nucleolus d. Mitochondria 2. This is an energy producing organelle.
More informationCELL/ PHOTOSYNTHESIS/ CELLULAR RESPIRATION Test 2011 ANSWER 250 POINTS ANY WAY IN WHICH YOU WANT
CELL/ PHOTOSYNTHESIS/ CELLULAR RESPIRATION Test 2011 ANSWER 250 POINTS ANY WAY IN WHICH YOU WANT Completion: complete each statement. (1 point each) 1. All cells arise from. 2. The basic unit of structure
More informationAP Biology-Chapter #6 & 7 Review
DO NOT WRITE ON THIS TEST- USE ANSWER DOCUMENT AP Biology-Chapter #6 & 7 Review Multiple Choice Identify the choice that best completes the statement or answers the question. 1. All of the following are
More informationINTRODUCTION TO THE CELL
CHAPTER 1: STRUCTURE AND FUNCTION OF THE CELL INTRODUCTION TO THE CELL Both living and non-living things are composed of molecules made from chemical elements such as Carbon, Hydrogen, Oxygen, and Nitrogen.
More informationEukaryotic Cell Structure: Organelles in Animal & Plant Cells Why are organelles important and how are plants and animals different?
Why? Eukaryotic Cell Structure: Organelles in Animal & Plant Cells Why are organelles important and how are plants and animals different? The cell is the basic unit and building block of all living things.
More informationcalled a cell wall. The cell wall protects against mechanical stress and keeps the cell from becoming over-filled with water.
What are Cells? By: Byron Norelius About Cells A cell is the basic unit of life. All living organisms are composed of one (unicellular) or more (multicellular) cells. In unicellular organisms, like many
More informationElectron Transport Generates a Proton Gradient Across the Membrane
Electron Transport Generates a Proton Gradient Across the Membrane Each of respiratory enzyme complexes couples the energy released by electron transfer across it to an uptake of protons from water in
More informationCellular Energy. 1. Photosynthesis is carried out by which of the following?
Cellular Energy 1. Photosynthesis is carried out by which of the following? A. plants, but not animals B. animals, but not plants C. bacteria, but neither animals nor plants D. all living organisms 2.
More informationOBJECTIVES PROCEDURE. Lab 2- Bio 160. Name:
Lab 2- Bio 160 Name: Prokaryotic and Eukaryotic Cells OBJECTIVES To explore cell structure and morphology in prokaryotes and eukaryotes. To gain more experience using the microscope. To obtain a better
More informationMultiple Choice Questions
Chapter 5 THE FUNDAMENTAL UNIT OF LIFE Multiple Choice Questions 1. Which of the following can be made into crystal? (a) A Bacterium (b) An Amoeba (c) A Virus (d) A Sperm 2. A cell will swell up if (a)
More informationOrganization and Structure of Cells
Organization and Structure of Cells All living things fall into one of the two categories: prokaryotes eukaryotes The distinction is based on whether or not a cell has a nucleus. Prokaryotic cells do not
More informationSix major functions of membrane proteins: Transport Enzymatic activity
CH 7 Membranes Cellular Membranes Phospholipids are the most abundant lipid in the plasma membrane. Phospholipids are amphipathic molecules, containing hydrophobic and hydrophilic regions. The fluid mosaic
More information2. Which type of macromolecule contains high-energy bonds and is used for long-term energy storage?
Energy Transport Study Island 1. During the process of photosynthesis, plants use energy from the Sun to convert carbon dioxide and water into glucose and oxygen. These products are, in turn, used by the
More informationPlant and Animal Cells
Plant and Animal Cells Cell Scientists Hans and Zacharias Janssen Dutch lens grinders, father and son produced first compound microscope (2 lenses) Robert Hooke (1665) English Scientist looked at a thin
More informationThe Living Cell from the Biology: The Science of Life Series. Pre-Test
1 Pre-Test Directions: Answer each question TRUE OR FALSE. 1. The instructions for making proteins are stored in molecules of DNA. 2. Proteins are made in the nucleus. 3. All cells are surrounded by a
More informationBuddhist Chi Hong Chi Lam Memorial College A.L. Bio. Notes (by Denise Wong) The Cell... Page 28
The Cell... Page 28 Organelles of cells: Introduction : - The cell is the fundamental unit of life. - The modern Cell theory states : i) All living organisms are composed of cells. ii) All new cells are
More informationLecture 8. Protein Trafficking/Targeting. Protein targeting is necessary for proteins that are destined to work outside the cytoplasm.
Protein Trafficking/Targeting (8.1) Lecture 8 Protein Trafficking/Targeting Protein targeting is necessary for proteins that are destined to work outside the cytoplasm. Protein targeting is more complex
More informationBiology 13A Lab #3: Cells and Tissues
Biology 13A Lab #3: Cells and Tissues Lab #3 Table of Contents: Expected Learning Outcomes.... 28 Introduction...... 28 Activity 1: Eukaryotic Cell Structure... 29 Activity 2: Perspectives on Tissue Preparations.
More informationUse of the Microscope and Cytology
Use of the Microscope and Cytology Introduction: A true study of anatomy not only considers the large, visible structures of an organism, but also the small structures that provide the organism its form
More informationStudent name ID # 2. (4 pts) What is the terminal electron acceptor in respiration? In photosynthesis? O2, NADP+
1. Membrane transport. A. (4 pts) What ion couples primary and secondary active transport in animal cells? What ion serves the same function in plant cells? Na+, H+ 2. (4 pts) What is the terminal electron
More informationMCAS Biology. Review Packet
MCAS Biology Review Packet 1 Name Class Date 1. Define organic. THE CHEMISTRY OF LIFE 2. All living things are made up of 6 essential elements: SPONCH. Name the six elements of life. S N P C O H 3. Elements
More information1.1.2. thebiotutor. AS Biology OCR. Unit F211: Cells, Exchange & Transport. Module 1.2 Cell Membranes. Notes & Questions.
thebiotutor AS Biology OCR Unit F211: Cells, Exchange & Transport Module 1.2 Cell Membranes Notes & Questions Andy Todd 1 Outline the roles of membranes within cells and at the surface of cells. The main
More informationPLANT CELLS AND ANIMAL CELLS
PLANT CELLS AND ANIMAL CELLS General Science, Biology, Anatomy, Physiology Grades 6 12 OBJECTIVES CONTENT THINKING SKILL/PROCESS Students will learn the role of cells as building blocks of all living structures.
More informationThe Cell Grade Ten. Estimated Duration: Three hours
Ohio Standards Connection: Life Sciences Benchmark A Explain that cells are the basic unit of structure and function of living organisms, that once life originated all cells come from pre-existing cells,
More informationGiven these characteristics of life, which of the following objects is considered a living organism? W. X. Y. Z.
Cell Structure and Organization 1. All living things must possess certain characteristics. They are all composed of one or more cells. They can grow, reproduce, and pass their genes on to their offspring.
More informationCell and Membrane Practice. A. chromosome B. gene C. mitochondrion D. vacuole
Name: ate: 1. Which structure is outside the nucleus of a cell and contains N?. chromosome. gene. mitochondrion. vacuole 2. potato core was placed in a beaker of water as shown in the figure below. Which
More informationpathway that involves taking in heat from the environment at each step. C.
Study Island Cell Energy Keystone Review 1. Cells obtain energy by either capturing light energy through photosynthesis or by breaking down carbohydrates through cellular respiration. In both photosynthesis
More informationTHE LIVING CELL. Cells also have variety of shapes. Plant cells are often rectangular or polygonal, while egg cells are usually spherical.
THE LIVING CELL A Tour of the cell The cell is the smallest and the basic unit of structure of all organisms. There are two main types or categories of cells: prokaryotic cells and eukaryotic cells. Prokaryotic
More informationAn Overview of Cells and Cell Research
An Overview of Cells and Cell Research 1 An Overview of Cells and Cell Research Chapter Outline Model Species and Cell types Cell components Tools of Cell Biology Model Species E. Coli: simplest organism
More informationCity Part Function Cell Part Controls what goes in and
Answer key: CELL CITY INTRODUCTION! Floating around in the cytoplasm are small structures called organelles. Like the organs in your own body, each one carries out a specific function necessary for the
More informationCellular Structure and Function
Chapter Test A CHAPTER 7 Cellular Structure and Function Part A: Multiple Choice In the space at the left, write the letter of the term or phrase that best answers each question. 1. Which defines a cell?
More informationParts of the Nerve Cell and Their Functions
Parts of the Nerve Cell and Their Functions Silvia Helena Cardoso, PhD [ 1. Cell body] [2. Neuronal membrane] [3. Dendrites] [4. Axon] [5. Nerve ending] 1. Cell body The cell body (soma) is the factory
More informationUNIT 1 - Living Organisms and the Environment Situations. Cells
Lesson Summaries HUMAN AND SOCIAL BIOLOGY UNIT 1 - Living Organisms and the Environment Situations Lesson 2 Cells OBJECTIVES At the end of this lesson you will be able to: a) Describe the structure of
More informationCh. 8 - The Cell Membrane
Ch. 8 - The Cell Membrane 2007-2008 Phospholipids Phosphate head hydrophilic Fatty acid tails hydrophobic Arranged as a bilayer Phosphate attracted to water Fatty acid repelled by water Aaaah, one of those
More informationCell and its organelles -1-
http://www.bristol.ac.uk/phys-pharm/media/teaching/ pharm/media/teaching/ Cell and its organelles -1- The main text for this lecture is: Vander s Human Physiology + some additions from Germann & Stanfield
More informationd:\data\newage~1\biote\bit-1.pm5/iiird proof/4-11-04 The Cell Part A CELL BIOLOGY
The Cell 1 Part A CELL BIOLOGY 2 Biotechnology The Cell 3 1 THE CELL The cell is the smallest structural and functional unit of the all living organisms. Cell biology is the study of the cell. Cell biology
More informationthe plant & animal cell
6.1 Basic unit of life Biology Biology Structure & functions of 06 the plant & animal cell In 1665, Robert Hooke observed a section of a cork using a microscope prepared by him. He discovered a structure
More information3120-1 - Page 1. Name:
Name: 1) Which series is arranged in correct order according to decreasing size of structures? A) DNA, nucleus, chromosome, nucleotide, nitrogenous base B) chromosome, nucleus, nitrogenous base, nucleotide,
More informationCELLS IN THE NERVOUS SYSTEM
NEURONS AND GLIA CELLS IN THE NERVOUS SYSTEM Glia Insulates, supports, and nourishes neurons Neurons Process information Sense environmental changes Communicate changes to other neurons Command body response
More informationMake your whiteboard come alive with science!
LER 6038 Grades 4+ Ages 9+ Make your whiteboard come alive with science! Explore a plant cell through handson investigation! A. Cell Wall A rigid and strong wall that protects and maintains the shape of
More informationVisualizing Cell Processes
Visualizing Cell Processes A Series of Five Programs produced by BioMEDIA ASSOCIATES Content Guide for Program 3 Photosynthesis and Cellular Respiration Copyright 2001, BioMEDIA ASSOCIATES www.ebiomedia.com
More information4a. A Busy Factory. Cell Structure: An Overview
4a. A Busy Factory Imagine a bustling factory manufacturing the latest must-have gadget. Whether they make bicycles, cell phones, or hot air balloons, most factories are set up in essentially the same
More informationCell Biology Questions and Learning Objectives
Cell Biology Questions and Learning Objectives (with hypothetical learning materials that might populate the objective) The topics and central questions listed here are typical for an introductory undergraduate
More informationThe Lipid Bilayer Is a Two-Dimensional Fluid
The Lipid Bilayer Is a Two-Dimensional Fluid The aqueous environment inside and outside a cell prevents membrane lipids from escaping from bilayer, but nothing stops these molecules from moving about and
More informationI. PLANT CELL, CELL WALL Bot 404--Fall 2004
I. PLANT CELL, CELL WALL Bot 404--Fall 2004 A. Review of General Anatomy 1. Major organs are stem, leaf, root. Flower is usually interpreted as a modified shoot, so sepals, petals, stamens and carpels
More informationMembrane Structure and Function
Membrane Structure and Function -plasma membrane acts as a barrier between cells and the surrounding. -plasma membrane is selective permeable -consist of lipids, proteins and carbohydrates -major lipids
More informationLook for these related items from Learning Resources :
Look for these related items from Learning Resources : LER 1901 Cross Section Plant Cell LER 1902 Cross Section Heart Model LER 1903 Cross Section Brain Model LER 2437 Cross Section Earth Model For a dealer
More informationComparing Plant and Animal Cells
1.2 Comparing Plant and Animal Cells Here is a summary of what you will learn in this section: Plant and animal cell structures are called organelles. Plant and animal cells perform some similar functions,
More informationCOMPARISON OF PLANT AND ANIMAL CELLS SIMILARITIES IN PLANT & ANIMAL CELLS
COMPARISON OF PLANT AND ANIMAL CELLS Cells vary widely in structure and function, even within the same organism. The human body, for example, has more than 200 different types of cells, each with a specialized
More information